Calculate: Adding 20 Units to 66 - Basic Addition Problem

To solve this problem, we'll follow these steps:

• Step 1: Identify the initial number and the amount to be added.
• Step 2: Perform the addition of the two numbers.

Now, let's work through each step:

Step 1: The initial number is given as 66, and we need to add 20 to it.

Step 2: We'll perform the addition:
$66 + 20 = 86$

Therefore, the solution to the problem is $86$.